We're dividing 6489015 by 646 
Our goal is to divide 6489015 by 646.

On to step 1:
The number 646 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 646

Step 2:
64 divided by 646 is 0 with a remainder of 64.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Bring next digit (8) of the dividend behind the 64 and repeat the process: 648 / 646

On to step 3:
When dividing 648 by 646, we get 1 with a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 646 from 648 to get 2.
Bring next digit (9) of the dividend behind the 2 and repeat the process: 29 / 646

Advancing to step 4:
29 divided by 646 is 0 with a remainder of 29.
The next digit of our result is 0. 
Result so far: 10.0
The remainder is 29 after subtracting 0 from 29.
Take the next digit (0) from the dividend and append it to 29, then repeat: 290 / 646

Let's proceed to step 5:
If we divide 290 by 646, we get 0 and a remainder of 290.
Record the quotient 0 as the next digit in the result. 
Result so far: 100.0
Deduct 0 from 290 and we're left with 290.
Fetch the next digit (1) from the dividend, attach it to 290 and continue: 2901 / 646

Let's proceed to step 6:
646 goes into 2901 4 times with a remainder of 317.
The next digit of our result is 4. 
Result so far: 1004.0
If we take 2584 away from 2901, we end up with 317.
Grab the next digit (5) from the dividend, add it to 317, then carry on: 3175 / 646

On to step 7:
The number 646 fits into 3175 4 times, leaving a remainder of 591.
Use 4 as the next digit of our solution. 
Result so far: 10044.0
If we subtract 2584 from 3175, we get 591.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5910, and continue the process.

Advancing to step 8:
646 can be fit into 5910 9 times, resulting in a remainder of 96.
Record the quotient 9 as the next digit in the result. 
Result so far: 10044.9
Subtract 5814 from 5910 to get 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Let's proceed to step 9:
When dividing 960 by 646, we get 1 with a remainder of 314.
The next digit of our result is 1. 
Result so far: 10044.91
The remainder is 314 after subtracting 646 from 960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3140, and continue the process.

Let's proceed to step 10:
3140 divided by 646 is 4 with a remainder of 556.
Put 4 as the next digit of the answer. 
Result so far: 10044.914
Deduct 2584 from 3140 and we're left with 556.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5560, and continue the process.

Going ahead to step 11:
646 goes into 5560 8 times with a remainder of 392.
The next digit of our result is 8. 
Result so far: 10044.9148
Subtracting 5168 from 5560 leaves us with 392.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

Going ahead to step 12:
3920 divided by 646 is 6 with a remainder of 44.
Put 6 as the next digit of the answer. 
Result so far: 10044.91486
The remainder is 44 after subtracting 3876 from 3920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Advancing to step 13:
440 divided by 646 is 0 with a remainder of 440.
The number 0 becomes the next digit in our result. 
Result so far: 10044.91486
If we take 0 away from 440, we end up with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Let's proceed to step 14:
4400 divided by 646 is 6 with a remainder of 524.
Use 6 as the next digit of our solution. 
Result so far: 10044.9148606
Deduct 3876 from 4400 and we're left with 524.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5240, and continue the process.

Moving on to step 15:
5240 divided by 646 is 8 with a remainder of 72.
The number 8 becomes the next digit in our result. 
Result so far: 10044.91486068
Subtracting 5168 from 5240 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

The final outcome is 10044.91486068, with a leftover of 7.2e-08.